Moss Removal
As stated by several roof tile manufacturers and the UK’s Trading Standards organisation, pressure washers CAN damage roof tiles, strip the surface granules from the tiles and SHORTEN tile life expectancy. There is also a risk of flooding to the loft space. At DM External Cleaning we use the manual method to clean your roof!
Removing the excess growth: Many roofs are cleaned when the moss has become excessive. The bulky material is scraped off using a simple implements. Below 30° pitch and when the tiles are sound, this can be done by pacing the roof itself. If the roof is too steep or fragile - period clay tiles for instance - the preparation is carried out from the eaves using bespoke telescopic tools.
Maintain Your Roof
The gutter outlets are protected against blockage beforehand. Tarpaulin is laid to receive the falling debris. If the moss balls are small and dispersed, they will fall naturally. Once the moss has been removed from the roof using the manual method a biocidal wash is applied to continue the cleanse, mother nature will do this over the following weeks. The biocide will get into the areas pressure washing won't and kill the spores that grow into moss on the surface.
A re-application of the biocide the following year is recommended to maintain the roofs appearance and prevent regrowth.